API 8 1/2" New PDC Bits,Steel Tooth Bit and TCI Tricone Bit 1-API or ISO 9001:2008 ... Wooden Casewe can supply tricone bits, diamond bits,PDC bits,TCI bits, steel tooth bits, milled tooth ... 8” to 17-1/2”.There are different PDC (polycrystalline diamond compact) grades and shapes applied ... ,517,617,637 TypeTricone bits, Steel tooth bits, PDC bits Applicable water well, oil field, construction, geothermal ...